diff --git a/spux/samplers/emcee.py b/spux/samplers/emcee.py
index 035de11051250e31ca9cdd494e26fd4e23d541f8..45d3623b90f72b8b17decdfe917bad615f80f95c 100755
--- a/spux/samplers/emcee.py
+++ b/spux/samplers/emcee.py
@@ -191,7 +191,7 @@ class EMCEE (Sampler):
lnpdiff = (self.dimensions - 1.) * numpy.log(zz) + Lps - lnprob0
except FloatingPointError as e:
print(":: WARNING: reject proposed parameter as two specular chains are at -inf, ",e)
- assert numpy.where(lnprob0==-float('inf'))[0] in numpy.where(Lps==-float('inf'))[0], ":: Fatal: -inf are not located where expected. This is a bug."
+ assert numpy.where(lnprob0 == -float('inf'))[0] in numpy.where(Lps == -float('inf') )[0], ":: Fatal: -inf are not located where expected. This is a bug."
lnprob0[numpy.isinf(lnprob0)] = 0
lnpdiff = (self.dimensions - 1.) * numpy.log(zz) + Lps - lnprob0
except: